call your Dr, honey. are you running a fever? is there any chance you have a kidney stone? they can cause infections and pain as well. you should not be in pain after you take the painkillers. period. that's a sign to seek further help.

that's where the kidneys are, remember? so it's not 'just' your back. kidney infections are a bitch and can cause scarring and damage. not to be scary but if the meds are not working, you should call and talk to someone. the inflammation and such need to be taken care of and you need to get this cleared up.